Carter: ISIS raid a 'significant blow' to terror group

The U.S. operation to kill a top ISIS commander on Saturday was a "significant blow" to the terror group, Defense Secretary Ashton Carter said.

The ISIS commander, Abu Sayyaf, was killed after he fought capture in the raid at al-Omar in eastern Syria, Carter said in a statement. His wife, an Iraqi named Umm Sayyaf, was caught and is being held in Iraq.

Carter said he had ordered the special forces raid against the terror group, also known as ISIL, at the direction of President